RIDGID 66997 Model F-60 Forged Vise, 6-inch Bench Vise All-steel, drop-forged construction for superior durability.Jaw Opening (inches) 6.3 Patented parallel jaw alignment system for precise clamping action and longer service life Steel handle with rubber anti-pinch rings and a rolled double lead Acme screw Features surface hardened slides for smooth, precise operation; large hardened anvil Sturdy forged steel swivel base with dual draw-down bolts